21110110212012 has 12 divisors (see below), whose sum is σ = 49256923828056. Its totient is φ = 7036703404000.

The previous prime is 21110110211893. The next prime is 21110110212017. The reversal of 21110110212012 is 21021201101112.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 21110110211982 and 21110110212000.

It is not an unprimeable number, because it can be changed into a prime (21110110212017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879587925489 + ... + 879587925512.

It is an arithmetic number, because the mean of its divisors is an integer number (4104743652338).

Almost surely, 2^{21110110212012} is an apocalyptic number.

It is an amenable number.

21110110212012 is an abundant number, since it is smaller than the sum of its proper divisors (28146813616044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21110110212012 is a wasteful number, since it uses less digits than its factorization.

21110110212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759175851008 (or 1759175851006 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21110110212012 its reverse (21021201101112), we get a palindrome (42131311313124).

The spelling of 21110110212012 in words is "twenty-one trillion, one hundred ten billion, one hundred ten million, two hundred twelve thousand, twelve".